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Iridium(III) and rhodium(III) complexes can catalyze the carbocyclization between 2‐phenylimidazo[1,2‐ a ]pyridine and α‐diazo esters. The reaction occurs via CH activation and dialkylation of the arene followed by intramolecular nucleophilic substitution. Iridium(III) and rhodium(III) catalysis offer complementary scopes with respect to the α‐diazo esters. magnified image
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Li et al. (2016) studied this question.
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